170,000

Indoor tanning has been linked to rising rates of melanoma, the deadliest form of skin cancer, and now a new study adds to the evidence that tanning beds also contribute to more common non-melanoma skin cancers, including basal cell carcinoma and squamous cell carcinoma, especially among people who start tanning before age 25. People who use tanning beds are 67% more likely to develop squamous cell carcinoma and 29% more likely to develop basal cell carcinoma than people who never use them, the review paper found, accounting for more than 170,000 new cases of non-melanoma skin cancers in the U.S. each year. [via BMJ]